Watch case



FIG. 1 is a front elevational view of a watch case, showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof; and

FIG. 5 is a top plan view thereof and the bottom plan view is identical. 

The ornamental design for a watch case, as substantially shown and described. 